package com.rusefi.ui.lua;


/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


/* A 1.4 class used by TextComponentDemo.java. */

import com.opensr5.ini.field.StringIniField;
import com.rusefi.binaryprotocol.BinaryProtocol;
import com.rusefi.io.LinkManager;
import com.rusefi.ui.UIContext;

import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.DocumentFilter;
import java.awt.*;

public class DocumentSizeFilter extends DocumentFilter {
    private final UIContext context;

    public DocumentSizeFilter(UIContext context) {
        this.context = context;
    }

    public void insertString(FilterBypass fb, int offs,
                             String str, AttributeSet a)
            throws BadLocationException {
        boolean isAllowed = checkIfAllowed(fb.getDocument(), str, 0);

        //This rejects the entire insertion if it would make
        //the contents too long. Another option would be
        //to truncate the inserted string so the contents
        //would be exactly maxCharacters in length.
        if (isAllowed) {
            super.insertString(fb, offs, str, a);
        } else {
            Toolkit.getDefaultToolkit().beep();
        }
    }

    private boolean checkIfAllowed(Document document, String str, int delta) {
        LinkManager linkManager = context.getLinkManager();
        BinaryProtocol bp = linkManager.getBinaryProtocol();
        if (bp == null)
            return true;
        StringIniField field = LuaScriptPanel.getLuaScriptField(bp);
        int limit = field.getSize();
        return (document.getLength() + str.length() + delta) <= limit;
    }

    public void replace(FilterBypass fb, int offs,
                        int length,
                        String str, AttributeSet a)
            throws BadLocationException {
        boolean isAllowed = checkIfAllowed(fb.getDocument(), str, -length);
        //This rejects the entire replacement if it would make
        //the contents too long. Another option would be
        //to truncate the replacement string so the contents
        //would be exactly maxCharacters in length.
        if (isAllowed) {
            super.replace(fb, offs, length, str, a);
        } else {
            Toolkit.getDefaultToolkit().beep();
        }
    }
}
